Best lower midrange ?

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dkxdn

dkxdn

Member
Joined 2002
langk.dk
Iam looking for the best midrange driver money can buy !
It should be running in the area 120hz - 1250 hz.
8" - 10" and higher than 92db in sensivity.

Any suggestion ?

Today I use one ScanSpeak 21w/8554 with double magnet and slided spider plus moved away the center dome. Its stting in dipole setup with active filter 24 db/LR.

An externally hosted image should be here but it was not working when we last tested it.
 
4

454Casull

Member
Joined 2004
GM said:
Greets!

'Best' is at best a 'moving target', ;) which you haven't completely defined, so based on my parameters: http://www.rlacoustique.com/reps1.htm If it doesn't make enough low distortion SPL in the desired BW, buy more since cost is no object.

GM
Click to expand...
It doesn't model very well near the lower end of the desired passband, unless he's going to build/buy a horn for it.

If a 12" driver was viable, the JBL 2206 would be a good choice except the 45-degree off-axis response is down by about 4dB at 1200Hz (may or may not be a good thing).
 
D

darkfury

Member
Joined 2008
Re: Again, best lower midrange

darkfury said:
I am confused to find a lower midrange having min. distortion values(3.)

some candidates (must have high gain; around 95db)

6'' 18Sound 6ND430

8'' 18Sound 8NMB420
BMS 8S215; BMS 8N515
Beyma 8LW30

10''




http://www.speakerstore.nl/index.php?pg=26&l=&productID=200
http://www.speakerstore.nl/index.php?pg=26&productID=780
Click to expand...


sorry for my finger misuse, the correct message....

I am confused to find a lower midrange having min. distortion values(3.)

some candidates (high-efficiency is a must; around 95db)

8'' 18Sound 8NMB420
BMS 8S215
BMS 8N515
Beyma 8LW30

10'' Selenium 10MB1P


IMO the drivers above, have greater distortion values than 18Sound
6ND430 has

high-efficiency and least distortion!?
any advice for a good driver?:(
 
D

D OB G

Member
Joined 2007
I've tried quite a few drivers (OB) and have settled on the PHY-HP 8" silver voice coil, alnico magnet, nominally 98 dB (a bit optimistic).

Very open sounding, so needs an open sounding tweeter (I'm using an Esotar, and I'm using a rear firing tweeter, but a ribbon would probably work well). It didn't mate well to a CD waveguide.

Looking at the website, you'll see that it has the most open basket of any direct radiator driver available (I've measured "flat" to 3 kHz from the rear radiation. I'm using it from 150 to 4 kHz (no visible cone movement). Some designs from Europe use it down to Fs, 40 Hz, up to roll-off, 8 kHz. Xmax is supposed to be (personal enquiry, not published), +/- 3.5 mm.

But I can't recommend it unreservedly because:

NEEDS EQ on OB (the published graph is very low resolution), but I'm using DEQX. (May be entirely due to freq response consequences above and below Fequal).

Expensive, but well made.

Can be supply problems in Europe from the factory (not an easy man to deal with).

But Madisound seems to have stock ??!! (last time I looked).

David
 
D

darkfury

Member
Joined 2008
crazyhub said:
http://www.clofis.nl/nl/thiel/C220-NT6.pdf
I use it up to 700hz, 18 liters vented fb 64hz f3 61hz; cleanliness and speed. Even listened to unfiltered no harsch sound maybe because of the very high frequency cone break-up.
Click to expand...

crazyhub, Yes I am familiar with Accuton drivers. I have Marten Design Monk(uses Accuton C173-6-92 midbass) bookself also
That's very good driver but cost will be too high for two pair

I wonder also RCF L8S800(93 db) Carbon Fiber Cone(two pair)
or Audax HM100C0 4" Carbon Fiber Cone(four pair)
but distortion check needs
http://www.rcf.it/vediMacro.phtml/s...3/LowFrequencyWoofer/WooferL8S800/product.htm

D OB G said:
I've tried quite a few drivers (OB) and have settled on the PHY-HP 8" silver voice coil, alnico magnet, nominally 98 dB (a bit optimistic).

Very open sounding, so needs an open sounding tweeter (I'm using an Esotar, and I'm using a rear firing tweeter, but a ribbon would probably work well). It didn't mate well to a CD waveguide.

Looking at the website, you'll see that it has the most open basket of any direct radiator driver available (I've measured "flat" to 3 kHz from the rear radiation. I'm using it from 150 to 4 kHz (no visible cone movement). Some designs from Europe use it down to Fs, 40 Hz, up to roll-off, 8 kHz. Xmax is supposed to be (personal enquiry, not published), +/- 3.5 mm.

But I can't recommend it unreservedly because:

NEEDS EQ on OB (the published graph is very low resolution), but I'm using DEQX. (May be entirely due to freq response consequences above and below Fequal).

Expensive, but well made.

Can be supply problems in Europe from the factory (not an easy man to deal with).

But Madisound seems to have stock ??!! (last time I looked).

David
Click to expand...

Yes David, I saw one pair on a second hand PHY on an internet site in my country. I couldn't catch it..sold
http://www.nonamehifi.com/ContentDetails.php?CID=10&ID=4996&arc=0&lang=en

My 3 way green speaker project :rolleyes: needs additional research
 
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